04 Duratech dies hard on acceleration. Also been noticing hard down shifts, speedo gets screwed up after hard accelleration. As long as you don't ever step on it everything is fine. hard down shifts have been for a year or more. Then speedo reading high after hard acceleration started. Now when I got in the freeway today and foored it it completely died. I rolled to the shoulder and it started right back up. What gives? Tranny, cats, what? Car has 95K on it. Help!